Patent GB-190700243-A (GB)
Title: Improvements in Automatic Weft Replenishing Mechanism for Looms.
Inventor: STITT WILLIAM RICHARD
Filed: 1907-01-04
Granted: 1908-01-02
Abstract: 243. Stitt, W. R. Jan. 4. Loom shuttles, changing bobbins and the like in, automatically ; stop - motions ; picking - motions.- When the weft thread is exhausted or nearly so, a fresh pirn, bobbin, or cop C, Fig. 5, is introduced into the shuttle from a magazine D on the breast beam &c. by means of a pusher or pusher-block G, the shuttle box being open at the front for the reception of the fresh pirn, and open at the back for the ejection of the old one. The magazine may be vertical or inclined, and the inner side may be grooved to correspond with the ribs or rings on the base of the cop holders or skewers. Below the magazine, a table E is placed, upon which the bottom pirn C may rest, the table being either fixed, or frictionally or spring connected to the pusher G above it. The pusher is reciprocated by a pawl h<2> on a rocking lever H actuated by a cam on the tappet-shaft. Normally, the end l of a latch L raises the pawl h<2> from its engaging position, but, when weftreplenishing is to occur, a movable or sliding rod e, Fig. 6, is engaged by the weft feeler or detector device c in the pirn C, which may be of the type described in Specification No. 21,013, A.D. 1905, the rod e is moved, and a lever e' is rocked. A cam e<2> thereon is then rotated, and permits the end l of the latch to fall. The lever e<1> may be actuated from the weft fork K by means of a rod k carrying fingers k<1>, k<2>. A weight W, attached to a rod w, rests on the pirns &c. in the magazine, and when the last one has been fed, the rod w rotates a rod d<1> carrying the levers d, d<2>, a trigger m<1> is rocked, and a pawl or lever M on the knocking-off lever m is allowed to fall in'o the path of the lay or a fitting m<2> thereon, so that the loom is stopped. Instead of the latch or lever M, a shutter may be employed, as described in Specification No. 12,889, A.D. 1906. The loom is stopped when the shuttle is not in the box by means of a lever N, which is normally rocked by the swell, but which, when the shuttle is not present in the box, acts on a finger m<3> on the rod d<1> and stops the loom. The swell or lever which engages the shuttle is preferably pivoted so as to engage at both ends upon the shuttle. In a modification, a stationary table is fixed somewhat in advance of the pusher G<1>, Fig. 9, which is provided with a latch g<1>. A projection g<3> on the sliding rod g<2>, which engages the weft feeler in the pirn &c., raises or lowers the latch into the path of the rccking lever H. The sliding rod g<2> may also be actuated by the weft-fork lever. This arrangement may also be applied to the sliding table. A shuttle-positioner, Fig. 9, in the form of a curved or cam plate is placed at the back of the picker, and another may be placed upon the sliding table to engage and position the shuttle ; a spring or other device may be connected to the picker to draw it back after each pick. The shuttle guard at both the ends of the loom is slotted to allow the thread to pass out and in when the weft is changed. A knife or shears is applied to the shuttle box, temples, sliding table, or shuttle &c., to sever the thread when a pirn is ejected and a fresh pirn inserted. According to the Provisional Specification, the rocking lever may carry a pawl, the mechanism being otherwise somewhat similar to that shown in Fig. 9 ; it is also stated therein that the mechanism d, d<2> and lever N may connect with the sliding rod and place it in position to prevent a change of pirn &c.